“It sounds like a wacky idea out of science-fiction - but it’s funded in part by billionaire Microsoft founder Bill Gates and backed by top scientists at Harvard University.

“The researchers believe that a fleet of specially-designed aircraft could spray sulfate particles into the lower stratosphere to cool down our planet and offset the effects of climate change.“

https://news.yahoo.com/bill-gates-backing-plan-to-stop-climate-change-by-blocking-out-the-sun-183601437.html